What are the material of the pulley
Cost, of course, is the most expensive. Cast steel. The key is to see where you're using.
Most metal and non-metallic materials can be made of pulley, the most commonly used is grey cast iron, which is more durable. It is cheap and easy to process.
The material of the pulley, besides the HT250 and cast steel, is also commonly used for casting aluminum. Aluminum is light, often used for a higher grade or some transmission system that wants to control the total weight. In addition, there is also engineering plastic or general plastic, which is used in situations where the intensity is not very strong or is not required for heat resisting, especially for small appliances.
